Accounting & Tax for Plumbers, Electricians & HVAC Contractors

CPA Services for Plumbers, Electricians & HVAC Contractors

Skilled trades businesses operate in one of the most heavily regulated environments in New Jersey. Between strict state licensing boards, the nation's most aggressive worker classification enforcement, complex sales tax rules that hinge on whether a job is a capital improvement or a repair, and significant equipment and vehicle investments, the financial side of running a plumbing, electrical, or HVAC business requires a CPA who actually understands the trade. Most accountants treat you like any other small business. I don't. I know how the money flows in a trades operation, and I build your books and tax strategy around that reality.

Entity structure is one of the first conversations I have with every trades client. Most plumbers, electricians, and HVAC contractors start as sole proprietors or single-member LLCs, which is fine when you are running lean. But once net profit consistently exceeds $70,000 to $80,000, the S-Corp election starts saving real money. At $250K revenue with $75K to $100K net profit, setting reasonable compensation at $60,000 to $70,000 and distributing the remainder saves approximately $3,800 to $4,600 in self-employment tax, netting roughly $1,500 to $2,500 after compliance costs. At $500K revenue with $125K to $200K net profit, annual SE tax savings reach $7,650 to $15,300, with net savings of $5,000 to $10,000+. At $1M+ revenue, savings reach $10,000 to $20,000+ per year, and retirement plan maximization through a Solo 401(k) (up to $70,000 in 2025 total contributions, $72,000 in 2026) becomes a major planning opportunity.

Reasonable compensation for owner-operators is the IRS's primary audit vector for S-Corp trades businesses, and NJ wages run 15% to 30% above national averages due to union presence and high cost of living. BLS data places NJ plumber mean wages at approximately $82,740 to $97,690 and electricians at $74,000 to $80,000. For an owner-operator generating $300K in revenue, reasonable salary falls in the $70,000 to $90,000 range. At $500K, the range rises to $85,000 to $110,000. At $800K, with significant management duties and capital equipment contributing to revenue, $100,000 to $140,000 is defensible. The IRS applies the 'many hats' methodology, valuing each function the owner performs: lead technician, estimator, sales, office manager, dispatcher. Setting compensation too low risks retroactive reclassification of distributions as wages, back employment taxes with 20% accuracy-related penalties, and reduced retirement plan contribution capacity.

The OBBBA permanently restored 100% first-year bonus depreciation for qualifying property acquired after January 19, 2025, and dramatically increased Section 179 limits to $2,500,000 for 2025 ($2,560,000 for 2026) with phase-out beginning at $4,000,000 ($4,090,000 for 2026). For trades businesses, this means a $65,000 Ford F-250 with a cargo bed of 6 feet or longer can be fully deducted in Year 1 via Section 179 or bonus depreciation because vehicles over 6,000 lbs GVWR that are not primarily passenger vehicles are exempt from both the Section 280F luxury auto caps and the SUV dollar limitation ($32,000 for 2026). For passenger vehicles under 6,000 lbs, the first-year depreciation cap is $20,200 with bonus depreciation or $12,200 without (2025 figures per Rev. Proc. 2025-16), regardless of the vehicle's cost.

Here is where NJ trades businesses get hit with a nasty surprise: NJ does not conform to federal bonus depreciation and has not since 2002. NJ's Section 179 limit is only $25,000. That $65,000 truck you fully deducted federally in Year 1 generates only a $25,000 NJ deduction, with the remaining $40,000 depreciated over 5 years for NJ purposes using MACRS without bonus. This federal-state timing difference requires careful tracking on the GIT-DEP worksheet and creates multi-year reconciliation obligations that many CPAs miss entirely. I track every asset on both the federal and NJ depreciation schedules so there are no surprises when your NJ return shows higher taxable income than your federal return.

Worker classification is the highest-risk compliance area for NJ trades businesses. While the IRS uses a flexible three-factor common-law test, NJ applies the far stricter ABC test (N.J.S.A. 43:21-19(i)(6)), which presumes every worker is an employee unless the employer proves all three prongs. Prong B is devastating for same-trade subcontracting: it requires that the service be performed outside the usual course of business of the hiring entity. A plumbing company hiring another plumber to help on plumbing jobs fails Prong B because plumbing is the company's usual course of business. The NJ Supreme Court's 2022 decision in East Bay Drywall v. NJDOL reinforced this, ruling 16 alleged subcontractors were employees and warning against requiring workers to form LLCs as a 'subterfuge.' Proposed NJDOL rules from May 2025 further closed the alternative path by treating customer locations as the employer's 'places of business.'

NJ misclassification penalties are severe and actively enforced. Since 2018, NJDOL has collected approximately $84 million in wage assessments and penalties, with $37 million in back wages assessed for approximately 8,500 workers in just the first seven months of 2025. The enforcement arsenal includes administrative penalties of up to $250 per employee for first violations and $1,000 per employee for subsequent violations, plus 5% of gross earnings over 12 months paid to the misclassified worker. Stop-work orders (approximately 200 issued since 2019) carry $5,000/day penalties for operating in violation. Businesses are listed on the public Workplace Accountability in Labor List (WALL), which bars them from NJ public contracts (280 businesses listed, owing over $26 million collectively). Personal liability extends to owners, directors, and officers, with potential criminal penalties including disorderly persons offenses.

NJ sales tax rules for contractors are among the most complex in the country, and getting them wrong triggers audit exposure from both directions. The core distinction is between exempt capital improvements and taxable repairs. Capital improvements, such as new heating systems, new plumbing installations, rewiring, and new construction, are exempt from sales tax on labor. The contractor pays 6.625% sales tax on materials at purchase and does NOT charge the customer sales tax, but must obtain a completed Form ST-8 (Certificate of Exempt Capital Improvement) from the property owner. Taxable repairs, such as fixing faulty plumbing, repairing electrical outlets, and servicing A/C units, require the contractor to charge 6.625% sales tax on labor. A critical billing detail: separately stating materials and labor limits sales tax to the labor portion only, since the contractor already paid tax on materials. Lump-sum billing subjects the entire amount to sales tax. There is also a special exemption for residential heating system repairs (serving no more than three families) where no sales tax applies to either parts or labor.

The NJ BAIT election is no longer optional for profitable S-Corps. The Business Alternative Income Tax allows S-Corps, partnerships, and multi-member LLCs to pay NJ income tax at the entity level, creating a federal deduction that effectively circumvents the $40,000 SALT cap (OBBBA, 2025-2029). BAIT rates are 5.675% on the first $250,000 of distributive proceeds, 6.52% on $250,001 to $1,000,000, and 10.9% on income over $1,000,000. The election must be made electronically by March 15 for calendar-year S-Corps, and quarterly estimated payments are required when the liability exceeds $400. For a trades business owner with $200,000 in NJ taxable income already hitting the SALT cap, BAIT can save $6,000 to $12,000+ in federal taxes by converting a capped itemized deduction into an unlimited business deduction. Single-member LLCs and sole proprietors are NOT eligible, which is another driver toward the S-Corp election.

Multi-state work triggers significant compliance obligations for NJ contractors. New York has no statewide contractor license but NYC, Nassau, Suffolk, and Westchester each have separate requirements. NJ-based owners and employees earning NY-source income must file NY nonresident returns (IT-203), and there is no NJ-NY reciprocal tax agreement. Pennsylvania requires registration under HICPA for contractors performing $5,000+ of residential work annually ($100 fee, every two years). PA imposes a flat 3.07% income tax on net profits, plus over 2,500 municipalities levy local Earned Income Tax ranging from 0% to approximately 3.924%. While NJ and PA have a reciprocal agreement, it covers only W-2 wages, not self-employment income or business profits from PA jobs. Connecticut requires state-specific trade licenses with no reciprocity with NJ. NJ provides a resident credit (Schedule NJ-COJ) for income taxes paid to other states.

For trades businesses approaching succession, the interplay between ordinary income recapture on depreciated equipment and capital gains treatment on goodwill is the single most impactful negotiating point in any sale. Equipment and vehicles trigger Section 1245 depreciation recapture as ordinary income (up to 37% federal plus 10.75% NJ). Goodwill, reflecting reputation, recurring customer base, and trained workforce, qualifies for long-term capital gains (maximum 23.8% federal including NIIT). NJ taxes capital gains as ordinary income with no preferential rate, so the combined maximum federal-NJ rate on capital gains reaches 34.55% while ordinary income components face up to 47.75%. A proper Form 8594 allocation can shift hundreds of thousands of dollars between these rates. Installment sales under Section 453 can spread liability over multiple years, though depreciation recapture must be recognized in the year of sale.

Workers' compensation is mandatory for all NJ employers and rates for trades rank among the nation's highest, approximately 92% above the national median. Approximate 2025 NJ rates per $100 of payroll: plumbing (Code 5183) at roughly $5.00, electrical wiring (Code 5190) at roughly $4.01, HVAC (Code 5537) at roughly $5.49, and clerical (Code 8810) at roughly $0.14. A plumbing business with 4 employees earning $45,000 each ($180,000 total payroll) pays approximately $9,000 annually in workers' comp premiums before experience modification. New businesses start at a 1.0 E-Mod until 3 years of claims history develop. I factor workers' comp costs into job costing and profitability analysis so you know your true fully-loaded labor cost per hour.

Every plumber, electrician, and HVAC contractor client works directly with me. I'm Greg Monaco, CPA. No junior staff. No handoffs. Whether you are a solo owner-operator running a service van or managing a multi-crew operation with 20 employees, I will set up your books properly, track your vehicles and equipment on both federal and NJ depreciation schedules, handle your sales tax compliance, and make sure your entity structure and tax strategy are optimized for where your business is right now and where it's heading.